We are looking for a Lead Backend Developer to deliver secure, scalable AI-driven API services and agentic workflows for our AI Pods. You will connect language models to internal systems, vector databases, and external tools via orchestration frameworks, treating LLMs as distributed components.ResponsibilitiesDesign and build backend API services along with LLM orchestration layersOwn API contracts and service reliability end-to-end, ensuring AI edge cases fail gracefullyIntegrate LLMs with disciplined systems engineering, including evaluation, observability, fallback handling, and cost awarenessImplement and maintain advanced RAG pipelines, covering document ingestion, chunking, embedding, and retrieval optimizationDevelop and connect agent tools using LangChain, LangGraph, and potentially MCP (Model Context Protocol)Build dependable, reusable orchestration frameworks and logic for downstream developer consumptionEnsure security, privacy, enterprise-grade observability,



and test coverage across all backend workflowsContribute to architecture decisions and engineering standards within the podCollaborate with frontend engineers, data engineers, and infrastructure teamsRequirementsProven backend engineering experience (5+ years) centered on microservices and distributed systemsHands-on proficiency in Python to build high-performance backend services and cloud-native APIsWorking knowledge of AWS plus containerization with Docker and orchestration via ECS/EKSStrong understanding of RESTful APIs and practical API design experienceSolid grasp of secure coding practices, including strong auth/authz fundamentalsEnglish proficiency at B2 (Upper-Intermediate) level or higherNice to have2+ years of hands-on experience with AI SDKs (OpenAI, Anthropic/Claude, AWS Bedrock, or equivalent) in productionPractical experience with vector databases (Amazon Kendra, OpenSearch), embedding strategies, and retrieval systemsHands-on experience with LangChain, LlamaIndex, or LangGraphFamilia

📌 Lead Backend Developer, AI Pods (Colombia)
🏢 EPAM Systems
📍 Colombia